Internal-combustion engine



Sept. 3, 1946. E. RYDER v J 2 INTERNAL-COMBiISTION ENGINE Filed June4,1943

@@i f i lll T I 20 23 3 INVENTOR.

flne/igyder Patented Sept. 3, 1946 UNITED STATES PATENT OFFICE INTERNAL-COMBUSTION ENGINE Elmer Ryder, Berwyn, Ill. Application June 4,1943, Serial No. 489,613

1 The present invention relates to an internal combustion engine orother mechanism including a piston and crankshaft, and especially to anovel means and method of balancing an engine of the single cylindertype for most effectively counteracting or eliminating the vibrationsincident to the operation of such an engine.

Among the objects of the present invention is to provide an internalcombustion engineof the single cylinder type in which the tortional andother vibrations incident to the reciprocation and operation of thepiston and connecting parts is substantially eliminated and therebyassuring optimum efficiency. In the disclosed embodiment the inventioncomprehends a novel counterbalancing means so constructed and arrangedas to insure continuous, smooth operation.

The invention further comprehends a novel construction and assembly ofan engine of the single cylinder type whereby its usefulness is greatlyenhanced and its manufacture, assembly and repair may be greatlyexpedited.

Further objects are to provide a construction of maximum simplicity,efficiency, economy and ease of assembly and operation, and such furtherobjects, advantages and capabilities as will later more fully appear andare inherently possessed thereby.

The invention further resides in the construction, combination andarrangement of parts illustrated in the accompanying drawing, and whilethere is shown therein a preferred embodiment, it is to be understoodthat the same is susceptible of modification and change, and comprehends other details, arrangements of parts, features andconstructions without departing from the spirit of the invention.

In the drawing:

Figure 1 is a view in end elevation of a single cylinder engineconstructed in accordance with the present invention.

Figure 2 is a fragmentary view in vertical cross section taken in aplane represented by the line 22 of Figure 3.

Figure 3 is a view in horizontal cross section through the engine andmore particularly showing the relationship of the parts.

Figure 4 is a view in vertical cross section through the crank andauxiliary shafts taken in a. plane represented by the line 4-4 of Figure3, but showing the balancing weights in another position in their cycleof rotation.

Figure 5 is a view similar to Figure 4, but showing still anotherposition of the balancing weights.

Referring more particularly to the illustrative 1 Claim. (Cl. 74604)embodiment disclosed in the drawing; the single cylinder internalcombustion engine I is shown as provided with a crank case 2 mountedupon a base 3 and having a cylinder 4 provided with circumferentialcooling or radiating. fins 5 exposed to the atmosphere. A piston 6 isadapted to reciprocate within the, cylinder 4 and it in turnreciprocates a connecting rod 1 having its upper end connected to thepiston by means of a wrist pin 8, and its lower sleeved end 8 split andencompassing a crank pin l0 carrying at its opposite ends the spacedeccentric weights H and l 2. Each weight is suitably keyed to or securedupon one of aligned sections l3 and IA of a crankshaft, with the end Hof the crankshaft journalled within a bearing I5 adapted to be insertedor removed from the exterior of the crank case and provided with a capor plate l6 adapted to be secured to or mounted upon the exterior bysuitable retaining means such as bolts or the like l1. Similarly, theouter end of the shaft I4 is journalled within a removable bearing [5'having a demountable cap or plate l6 for securing the journal within awall of the crank case 2 by means of bolts or other securing means 11'.

The stub shaft or crank shaft section l3 also carries a gear l8 incontinuous mesh with and driving a similar gear [9 keyed to and mountedupon an auxiliary or driven shaft 20. Also eccentrically mounted upon orkeyed to this auxiliary or driven shaft is a balance weight 2|, which inthe disclosed embodiment is disposed intermediate the eccentricallymounted weights H and I2 on the crank shaft. This counterbalancingweight 2| is rotated in timed relation with and in a direction oppositeto that of the spaced, eccentric weights II and I2 and is adapted tocounteract these last mentioned weights in the cycle of operation.

The opposite ends of the sections of the auxiliary or driven shaft 20are journalled in detachable or removable bearings 22, 22, adapted to beinserted and removed from the exterior of the crank case and with oneend of a shaft section extending to the exterior of the crank case andthereat providing a drive shaft for supplying power to a driven memberor unit. Any suitable means may be provided for anchoring these bearingsor journals in position such as an enlarged head or cap 23 by whichthese journals maybe secured upon the exterior of the crank case by anysuitable means such as bolts or other securing means. By making thebearings l5, l5 and 22 removable, the operating parts within the enginemay be quickly assembled by insertion upwardly through the base 3 andthe ends of the shaft sections thereafter inserted in the alignedjournals or bearings [5, I5 and 22 and the latter then suitably securedin place.

The invention further comprehends providing concentric weights such asfly wheels 24, 24 on the sections of the crank shaft and a weight or flywheel 25 on a section of auxiliary shaft keyed to and rotating inopposite directions with their respective shafts. The weight 25aggregates-that of the weights 24, 24 and these weights, along with theweights H, I2 and 2|, afiord smooth operation under any and allconditions.

In the operation of the present engine, the;

auxiliary weight 2| counteracts the weights H and I2, and due to thegeared connection of'the- Thus when,

vertically upward as in Figure 4 or in a position therefrom, theybalance the piston 6. This effectively prevents or counteracts the usualvibrations incident to the operation of a single cylinder engine.

Having thus disclosed my invention, I claim:

In an internal combustion engine comprising a single upright cylinder, apiston reciprocable in said cylinder, and a horizontally disposed crankshaft connected to and. driven by the piston, an eccentriemass secured"to the crank shaft, an auxiliary shaft mounted parallel to and disposedin the same horizontal plane as the crank shaft, gearing between theshafts whereby the auxiliary shaft is rotated oppositely to and at thesame angular speed as the crank shaft, and an eccentricmasssubstantially equal in effect to the first mass secured to saidauxiliary shaft, said masses. being disposed at similar points in theircycle in their upper and lower positions, and in opposition to oneanother in. their horizontal positions.

ELMER RYDER.

